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二化螟原为浙江省主要水稻害虫之一,但在1956年后大部分地区发生一直较轻。近几年来,随着迟熟早稻品种的扩大和耕作制度的改变,加上防治上偏重三化螟,二化螟的为害又趋严重。为了打中要害,达到经济有效地进行防治,特开展了根据螟卵分布数量与为害程度来确定防治对象田的调查研究。现将1965年在嘉兴专区以连作稻为主,单、双季稻混栽区,主要是单季晚稻与双季稻混栽区的初步调查结果整理如下。
Borer was originally one of the major rice pests in Zhejiang Province, but it has been lighter in most areas since 1956. In recent years, with the late maturity of early rice varieties and tillage system to expand the change, coupled with emphasis on the prevention and control of the three Borer, Chilo suppressalis serious damage. In order to hit the key, to achieve economic and effective prevention and control, especially carried out according to the distribution of borer eggs and the degree of harm to determine the field of prevention and control research. Now in 1965 in Jiaxing area mainly for continuous cropping rice, single and double cropping rice mixed area, mainly single season late rice and double cropping rice mixed area preliminary findings are summarized below.